Mybooklibrary.com/pdf/suzuki-boulevard-c50-service-manual.pdf Can't help you out with the late model 4 stroke, but I do have a pdf of the Suzuki factory service manual for "All Motors 2-225 HP 1988-2003" Its rather a hefty file (21.9MB) but if anyone needs a copy, I can host a download location. Don't remember where I found it, but google is your friend. A URL is the same as a "Link" Reason I asked for folks to send me a private message for the link is, if I post the link in the forums the search engines will pick it up and with such a large file, it could cause me problems on my server. Interestingly, the DF6 is exactly the same specs as DF4, which I have. I often wonder how I could get the DF6 power output and wonder is it just a hher rev range using a different neddle in the carb? I was able to find and download an ownersmanual for a tohatsu 6 hp which is very similar to the Suzuki. This PDF book provide suzuki boulevard c50 ownersmanual pdf guide. To downloadfreesuzuki sj413 service suzuki samurai, vitara, jimny you.